consulate in benghazi. the attackers fought gun battles with u.s. and libya personnel for five hours until the u.s. ambassador and others were dead. the attack appeared too well organized to have been entirely spontaneo spontaneous. the libyan government profusely apologized. now washington is hunting the militants responsible. al qaeda cells in libya are a likely target. al qaeda recently threatened retaliation against the u.s. for its killing last summer of al qaeda's second in command, a libyan militant. intelligence officials suggest killing u.s. ambassador chris stevens in benghazi may have been al qaeda's response. a shock to the state department and his friends. >> we've lost really a great statesman. we've lost one of the highest quality people that anyone could ever know. >> as coffins of the american personnel were loaded on a train in tripoli, outside the white house a candle light vigil to honor the dead amid promises of delivering justice. >> reporter: the clashes in front of the u.s. embassy here are somewhat sporadic. they will have m